// Protocol Buffers for GWT
// Copyright 2010 Thomas Broyer  All rights reserved.
// http://code.google.com/p/protobuf-gwt/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

package net.ltgt.gwt.protobuf.compiler.server;

import com.google.protobuf.Descriptors.Descriptor;
import com.google.protobuf.Descriptors.FileDescriptor;
import com.google.protobuf.Descriptors.ServiceDescriptor;
import com.google.protobuf.compiler.CodeGenerator;
import com.google.protobuf.compiler.JavaHelpers;

import net.ltgt.gwt.protobuf.compiler.AbstractFileGenerator;
import net.ltgt.gwt.protobuf.compiler.CustomFieldSerializerGenerator;
import net.ltgt.gwt.protobuf.compiler.ServiceAsyncGenerator;
import net.ltgt.gwt.protobuf.compiler.ServiceGenerator;
import net.ltgt.gwt.protobuf.compiler.client.MessageGenerator;

import java.io.IOException;
import java.io.Writer;

/**
 * @author t.broyer@ltgt.net Thomas Broyer
 * <br>Based on the initial work of:
 * @author kenton@google.com Kenton Varda
 * <br>Based on original Protocol Buffers design by
 * Sanjay Ghemawat, Jeff Dean, and others.
 */
public class FileGenerator extends AbstractFileGenerator {

  public FileGenerator(FileDescriptor file) {
    super(file);
  }

  public void generate(String javaFilename, CodeGenerator.Context context)
      throws IOException {
    if (!file.getOptions().getJavaMultipleFiles()) {
      for (Descriptor descriptor : file.getMessageTypes()) {
        generateSerializationMethods(descriptor, javaFilename, context);

        Writer output = context.openForInsert(javaFilename,
            JavaHelpers.getOuterClassScopeInsertionPoint());
        try {
          new CustomFieldSerializerGenerator(descriptor).generate(output);
        } finally {
          output.close();
        }
      }

      if (!file.getOptions().getJavaGenericServices()) {
        for (ServiceDescriptor service : file.getServices()) {
          Writer output = context.openForInsert(javaFilename,
              JavaHelpers.getOuterClassScopeInsertionPoint());
          new ServiceGenerator(service).generate(output);
          new ServiceAsyncGenerator(service).generate(output);
          output.close();
        }
      }
    }
  }

  public void generateSiblings(String packageDir,
      CodeGenerator.Context context) throws IOException {
    if (file.getOptions().getJavaMultipleFiles()) {
      for (Descriptor descriptor : file.getMessageTypes()) {
        generateSerializationMethods(descriptor, packageDir + descriptor.getName() + ".java", context);
        
        generateSibling(new CustomFieldSerializerGenerator(descriptor),
            packageDir, context);
      }
      if (!file.getOptions().getJavaGenericServices()) {
        for (ServiceDescriptor service : file.getServices()) {
          generateSibling(new ServiceGenerator(service), packageDir,
              context);
          generateSibling(new ServiceAsyncGenerator(service), packageDir,
              context);
        }
      }
    }
  }

  private void generateSerializationMethods(Descriptor descriptor,
      String javaFilename, CodeGenerator.Context context) throws IOException {
    MessageGenerator generator = new MessageGenerator(descriptor);

    Writer output = context.openForInsert(javaFilename,
        JavaHelpers.getClassScopeInsertionPoint(descriptor));
    generator.generateParseFromMethods(output);
    generator.generateMessageSerializationMethods(output);
    output.close();

    output = context.openForInsert(javaFilename,
        JavaHelpers.getBuilderScopeInsertionPoint(descriptor));
    generator.generateBuilderParsingMethods(output);
    output.close();
    
    for (Descriptor nestedTypes : descriptor.getNestedTypes()) {
      generateSerializationMethods(nestedTypes, javaFilename, context);
      
      output = context.openForInsert(javaFilename,
          JavaHelpers.getClassScopeInsertionPoint(descriptor));
      new CustomFieldSerializerGenerator(nestedTypes).generate(output);
      output.close();
    }
  }
}
